Question 166

A boat running downstream covers a distance of 24 km in 4 hours, while for covering the same distance upstreams it takes 6 hours. What is the speed of the boat in still water?

Solution

Let the speed of the boat be S and the speed of the stream be R.

So, 24 / 4 = 6 = S + R

24 / 6 = 4 = S - R

So, 2S = 10 => S = 5 and R = 1

So, speed of the boat in still water = 1 kmph

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